Re: [boost] Creating recursive types (typelist etc.)

From: Hamish Mackenzie (boost_at_[hidden])
Date: 2001-11-28 16:48:35

On Wed, 2001-11-28 at 20:37, David A. Greene wrote:
> > My preference now is for macros with expectation that they would be
> > replaced with a suitable extension to the C++ language at some point in
> > the future. At that time existing code would not need to be updated just
> > the macros would change.
> > 
> > The macros would be of the form RECURSIVE_NN( Traits, ... ) and
> > RECURSIVE_NN_T( Traits, ..., Tail ) where NN is the number of arguments
> > represented by ...
> 
> The problem with macros, as Andrei pointed out, is commas.
> Passing multi-parameter templates to the macro is impossible.
> I just ran into this problem today in a completely unrelated
> area.  :(

Doh!

And a typdef won't even help when specializing a template.

Ok so the macro approach does suck :-(

Hamish